Spirometer.



G. W. RAMAGEY.

SPIROMETER.

APPLICATION FILED Nov. 1, 1909.

Patented Aug. 2, 1910.

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G. W. RAMAGE. SPIROMETER. APPLICATION rmnn- NOV. 1. 1909.

Patented Aug. 2, 1910.

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GEORGE WOOD RAMAGE, OF NEW YORK, N. Y.

SPIROMETER.

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Application filed. November 1, 1909.

To all whom it may concern:

Be it known that I, GEORGE WVooD RAM- .\on, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented or discovered certain new and useful Improvements in Spirometers, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention has for its object to provide a spirometer of compact construction, so that it is adapted to be carried in the pocket if desired, and in which the fanwheel or wind-wheel is arranged in a passageway or compartment between which and a compartment in which the gearing mechanism for operating the index is arranged there is a division wall which will prevent the breath of the user from passing into the gear compartment, to the injury of the gearing mechanism; as also to provide a convenient construction whereby the index may be reset after use without requiring any objectionable projections on or from the case.

The invention also relates to other tures, as will hereinafter appear.

In the accompanying drawings Figure 1 is a central transverse section of the improved spirometer, and Fig. 2 is a section, at right angles to the plane on which Fig. 1 is taken, on line 2-2, Fig. 1. Fig. 3 is a sec tion on line 33, Fig. 1. Fig. 1 is a detail section on lines (6-b or c-cl of Figs. 2 and 3. Fig. 5 is a face view of the setting button, and Fig. 6 is a sectional view of the same. Fig. 7 is an enlarged sectional view through the central portion of the inner case of the spirometer. Fig. 8 is a front face view of the instrument with the air tube broken away, and Fig. 9 illustrates the mouth piece of the air tube.

Referring to the drawings, A denotes the body portion of the outer case, and which is provided with a screw-threaded flange or lip A for the reception of the bezel B in which is mounted the glass crystal J, these parts forming the outer case. WVithin the said outer case is mounted an inner case comprising a circular division plate or body L provided with a flange C which is rabbeted for the reception of a disk or plate H; the said division plate L, having, extending in a direction opposite to the flangeC, a second flange C which is recessed or rabbeted into fea- Specification of Letters Patent.

Patented Aug. 2, 1910.

Serial No. 525,802.

a plate or disk D between which and the body portion A is interposed a packing disk E forming an air-tight joint between said plate or disk E and said body A. The body A is provided with a hollow nipple K which receives the flexible air tube V, said nipple having an air passage w and being preferably screwed into the said body A so that it may be removed, if desired, with said tube, when the device is to be carried in the pocket. Said body is also provided with a pendant or knob T preferably formed integral therewith, the said pendant or knob being provided with a ring U. The air tube V is provided at its free end with a suitable mouth piece TV.

The fan-wheel or wind-wheel F, which is arranged in the chamber Q, between the division plate L and the plate or disk D, is fixed on a sleeve or cannon pinion or arbor 6 provided with a pinion f which meshes with a gear wheel 7' having a pinion meshing with a gear wheel is which in turn is provided with a wheel Z having a pinion meshing with a cen tral gear wheel m which is fixed to a hollow arbor 9 within which is frictionally mounted, so as normally to rotate therewith, a central pin or post It to which is attached the index or indicating hand a secured to said pin or post by the cap 0. The arbors of the gear wheels just referred to have thelr bearings in the plates H and L, and the main arbor g has bearings in the plate H and arbor 6, while the arbor 6 has hearings in the plates D and L. The fan-wheel F is formed with a series of peripheral concave recesses or buckets, able angles and affording a series of radial wings closely fitting within the wall of the chamber Q.

From the construction above described it results that when the fan-wheel or windwheel F is rotated, by a current of air blown into the device by the user, the index or hand a will be rotated over the dial plate I to indicate, according to the figures on said dial plate, the amount of air in cubic inches passing or blown through the device; while the said pin or post h, frictionally mounted within the main arbor 9, may be reset to zero or to the point marked 300 on the dial plate, by turning it in its frictional mounting in the said main arbor g.

The inner case is secured to the outer case,

pinion meshing with a gear thus avoiding obj ectionto prevent one case from turning relative to the other, by the webs or bulk-heads o, sald bulk-heads also serving as divisions between the inlet chamber P and the outlet chamber R. The said chamber R opens into an outlet passage S which is provided with an exit opening :19 in the pendant or knob T. The outlet passage S is larger than the inlet pas sage w, so that a free escape for the air is thus afforded. The inlet chamber P is divided from the fan or wind-wheel chamber Q by the flange C of the division plate L, said flange being provided with a tube or passageway g forming a contracted inlet from the chamber P to the fan-wheel or wind-wheel chamber Q. The said inlet or passageway Q is so arranged or inclined as to discharge the air entering the wind-wheel chamber directly against the radial wings of the wind-wheel at approximately a right angle thereto. The said flange C is provided with outlet openings 1 from the chamber Q to the chamber R. The chamber P serves as a condensing chamber for much of. the moisture which has not been condensed in the blow tube V, thereby preventing such moisture from entering the fan wheel chamber Q. The circumferential flanges C and C at the outer edges of the inner case fit tightly against the inner wall of the outer case, thus affording the chambers P and R which are tightly closed except for ingress and egress of air. I

To provide for a convenient resetting of the index or hand a the pin or arbor it is provided with a head it adapted to be received in a rectangular recess a of a setting disk or button M bet-ween which and the plate D is interposed a volute coil spring M which normally forces the said setting button or disk outward, as shown in Fig. l, but which permits it to be pressed inward so that the rectangular opening a will engage the head it of the pin or arbor 71, when the said disk or button can be turned to reset the index or dial hand a after the spirometer has been used. The recess a may have a suitable lining a as shown in Figs. 1 and 6, if desired. The coil spring N is received in an annular recess t in the button M, when the said button is pressed inward for engagement with the head it of the index pin or arbor 71,. To facilitate a frictional turning of the setting button M, the outer face of the latter is preferably provided with crossing grooves 72, or it may be otherwise roughened, so that when the thumb or finger of the user is pressed against the same a frictional hold will be afforded whereby the said button may be turned in setting the index or hand a. The outward movement of the button under the stress of the spring N is limited by a flange .9 With which said but ton is provided.

The pinion bearing openings in the divior shut off from the wheel chamber Q by a washer G, and the joint between the inner end of the arbor c and a shoulder on the main arbor g is relieved of friction by a washer z'. A ring y, inside of the periphery of the crystal J, serves to hold the said crystal in place and to form a tight joint at this point, so as to tightly close the chamber in which the index or dial hand a is located. When the bezel B is tightly screwed in place it will not only serve to hold the inner case tightly within the outer case, but, by compresssion upon the dialplate I, which projects beyond and covers the joint between parts A and C, will render said joint and those about bulkheads o 'v, and packing washer E, air tight.

From the foregoing it will be understood that the invention affords a compact and novel spirometer which is of such a construction that when the user blows into the same, to operate the fan or wind-wheel, the moist breath of the user cannot penetrate to the chamber in which the gearing mechanism is located, nor to the bearings for the arbors of the gear wheels, and the delicate mechanism of the device will. thus be protected from injury, and lodgment within the device of objectionable moisture will be reduced to a minimum, so that the device will be of a cleanly and sanitary character. Also the gearing mechanism will be protected from outside moisture by the various packings which have been described, and thus injury to the mechanism of the device from unfavorable atmospheric influences will be avoided.

Having thus described my invention I claim and desire to secure by Letters Patent:

1. In a spirometer, the combination with inner and outer cases rigidly attached to gether but partly separated from each other to form a condensing chamber, said inner case being constructed to form a fan-wheel or windwvheel chamber communicating with said condensing chamber, said compartment and condensing chamber being formed or packed so as to be air-tight except for inlet and outlet of air, a fanwheel or windwheel in said compartment, an index, gearing mechanism between said fan-wheel or wind-wheel and said index, a tightly closed chamber in which said index is located, and a dial in said index chamber and over the face of which said index is movable.

2. In a spirometer, the combination with a rotatable index, and means for operating the same comprising a post or pin and a rotatable arbor in which said post or pin is frictionally mounted, of means for setting said index comprising a setting button, a spring for normally holding the said setting button out of engagement with said post or pin, but which spring will yield when said sion plate L are closed fan Wheel or wind packing disk or button is pressed upon and gagement of said button with a part of said post or pin.

3. In a spirometer, the combination with the body A provided with a threaded flange A, of a bezel secured to said flange, a crystal mounted in said bezel, the division plate L provided with the flanges G and C, the plate I-I rabbeted into the said flange C, the plate D into which the said flange C is recessed or rabbeted, and between which plates D and L is afforded a chamber Q, a fan or windwheel located in said chamber, a train of gearing located in the chamber 0 between the said plates L and II and operated from said fan or wind-wheel, a dial plate, and a rotary index or dial hand it operated from said gearing,

&. In a spirometer, the combination with a rotary fan or wind-wheel, of an indexcarrying pin or post concentric with said fan or wind-wheel, an arbor in which said pin or post is frictionally mounted, so that said pin or post may be rotated independently of said arbor for resetting, an arbor concentric with the first-named arbor and rotatable independently thereof, and to which last-named arbor the said fan or wind-wheel is attached, and gearing connections between said arbors.

5. A spirometer provided with a suitable fan or wind-wheel chamber, an air inlet passage and a condensing chamber between the said air inlet passage and said fan or windwheel chamber and partially surrounding the latter chamber.

6. In a spirometer, the combination with an outer case, of an inner case having two compartments between which is an air-tight closure or partition, said inner case having circumferential flanges at its outer edges and which flanges closely fit against the inner wall of the outer case, leaving between said flanges and said wall a condensing chamber and an outlet chamber divided by bulkheads from each other, said chambers being tightly closed except for ingress and egress of air, a fan-wheel in one of said compartments of said inner case, and gearing mechanism, operated from said fan-wheel, in the other of said compartments of said inner case.

7. In a spirometer, the combination with an outer case, of an inner case provided with two compartments between which is an air tight closure, the said cases being rigidly permit the enbeing partly separated from each other to form between them a condensing chamber, a fan-wheel or windwheel located in one of said compartments which communicates with said condensing chamber, said compartment and condensing chamber being formed or packed so as to be air-tight except for inlet and outlet of air, gearing mechanism operated from said fan-wheel or wind-wheel in the other of said compartments, a dial, and an index movable adjacent to said dial and operated from said fan-wheel or wind-wheel through the said gearing mechanism.

8. In a spirometer, the combination with an outer case, of an inner case provided with two compartments between which is an air tight closure, the said cases being rigidly secured together but being partly separated from each other to form between them a condensing chamber, a fan-wheel or windwheel located in one of said compartments which communicates with said condensing chamber, said compartment and condensing chamber being formed or packed so as to be air-tight except for inlet and outlet of air, gearing mechanism operated from said fan-wheel or wind-wheel in the other of said compartments, a dial, an index movable adjacent to said dial and operated from said fan-wheel or wind-wheel through the said gearing mechanism, a bezel screwed to said outer case and thus forming a part thereof, and a glass crystal held in said bezel and packed so that said outer case will be tightly closed.

9. In a spirometer, the combination with inner and outer cases rigidly attached tosecured together but gether but partly separated from each other a to form a condensing chamber, said inner case being constructed to form a fan-wheel or wind-wheel chamber communicating with said condensing chamber, said compartment and condensing chamber being formed or packed so as to be air-tight except for inlet and outlet of air, a fan-wheel or wind-wheel in said compartment, an index, and gearing mechanism between said fan-wheel or windwheel and said index.

In testimony whereof I affix my signature, in presence of two witnesses.

GEORGE WOOD RAMAGE. Witnesses:

WM. P. HAMILTON, Jr., L. K. F. HUMPHREY. 

